Astronomy and Astrophysics – Astronomy
Scientific paper
Nov 2000
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000eaa..booke3995.&link_type=abstract
"Encyclopedia of Astronomy and Astrophysics, Edited by Paul Murdin, article 3995. Bristol: Institute of Physics Publishing, 2001
Astronomy and Astrophysics
Astronomy
History And Archaeoastronomy, Biographies
Scientific paper
Born in Michigan, joined the original staff of the Mount Wilson Observatory. He used astrophotography of JACOBUS KAPTEYN's selected areas as part of the worldwide effort to determine the structure of the Galaxy, standardizing the stellar magnitude system. He extended it beyond the eighteenth magnitude by photographing stars of different brightnesses through wire screens and comparing the diffract...
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